A holographic sensor is a device that comprises a hologram embedded in a smart material that detects certain molecules or metabolites.[1] This detection is usually a chemical interaction that is transduced as a change in one of the properties of the holographic reflection (as in the Bragg reflector), either refractive index or spacing between the holographic fringes.[2] The specificity of the sensor can be controlled by adding molecules in the polymer film that selectively interacts with the molecules of interest.
A holographic sensor aims to integrate the sensor component, the transducer and the display in one device for fast reading of molecular concentrations based in colorful reflections or wavelengths.[3]
Certain molecules that mimic biomolecule active sites or binding sites can be incorporated into the polymer that forms the holographic film in order to make the holographic sensors selective and/or sensitive to certain medical important molecules like glucose, etc.
The holographic sensors can be read from a fair distance[quantify] because the transducer element is light that has been refracted and reflected by the holographic grating embedded in the sensor. Therefore, they can be used in industrial applications where non-contact with the sensor is required.
Other applications for holographic sensors are anti-counterfeiting [4]
^AK Yetisen; I Naydenova; F da Cruz Vasconcellos; J Blyth; CR Lowe (2014). "Holographic Sensors: Three-Dimensional Analyte-Sensitive Nanostructures and their Applications". Chemical Reviews. 114 (20): 10654–96. doi:10.1021/cr500116a. PMID 25211200.
^AK Yetisen; Y Montelongo; FC Vasconcellos; JL Martinez-Hurtado; S Neupane; H Butt; MM Qasim; J Blyth; K Burling; JB Carmody; M Evans; TD Wilkinson; LT Kubota; MJ Monteiro; CR Lowe (2014). "Reusable, Robust, and Accurate Laser-Generated Photonic Nanosensor". Nano Letters. 14 (6): 3587–3593. Bibcode:2014NanoL..14.3587Y. doi:10.1021/nl5012504. PMID 24844116.
^AK Yetisen; H Butt; F da Cruz Vasconcellos; Y Montelongo; CAB Davidson; J Blyth; JB Carmody; S Vignolini; U Steiner; JJ Baumberg; TD Wilkinson; CR Lowe (2014). "Light-Directed Writing of Chemically Tunable Narrow-Band Holographic Sensors". Advanced Optical Materials. 2 (3): 250–254. doi:10.1002/adom.201300375. S2CID 96257175.
^FC Vasconcellos; AK Yetisen; Y Montelongo; H Butt; A Grigore; CAB Davidson; J Blyth; MJ Monteiro; TD Wilkinson; CR Lowe (2014). "Printable Surface Holograms via Laser Ablation" (PDF). ACS Photonics. 1 (6): 489–495. doi:10.1021/ph400149m.
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